And william



(No-Model.) v l.

l J. H'.-& W. H. W-ALTERS.

GIN SAW FILING MACHINE.

' Patented'May 3,1898.

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yGIN SAW FILING MACHINE.

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// f f l we NoRms PETERS co. worauruo.. WASHINGTON, n. c

' UNITED f STATESk PATENT unica.

JAMES I-I. WALTERS, OF MOORESVILLE, NORTH CAROLINA, AND WILLIAM HENRYWALTERS, OF WAYNESBOROUGH, GEORGIA.

GIN-SAW-FILING 4MACHlN-E.

SPECIFICATION forming part of Letters Patent No. 603,302, dated May 3,1898.

Application led October 28 1897. Serial No. 656,664. (No model.)

To wZZ, whom/ it may concern.-

Be it known that we, JAMES H. WALTERS, residing at Mooresville,in thecounty of Iredell and State of North Carolina, and WIL- LIAM HENRYWALTERS, residing at'Waynesborough, in the county of Burke and State ofGeorgia, citizens of the United States, have invented a new and usefulGin-Saw-Filing Machine, of which the following is a specification.

Our invention relates to gin-saw-filing machines, and has for its objectto provide a simple, durable, and compact arrangement of parts foroperating and guiding reciprocatory file-carriers; to provide a simpleand efficient construction and arrangement of saw-feedin g devices; toprovide a readily-adjustable tension device for varying the pressure ofthe file-carriers toward the saw, and to provide simple means, inconnection with the sawfeeding devices, for tripping the le-carriers atthe end of a desired number of strokes to remove the files from theteeth of the saw to permit feeding of the latter.

v Further objects and advantages of this invention will appear in thefollowing description, and the novel features thereof will beparticularly pointed out in the appended claims.- Y

In the drawings, Figure 1 is a perspective view of a iiling-machineconstructed in accordance with our invention. Fig. 21s a longitudinalsection of the same. Fig. 3 is a transverse section on. the line 3 3 ofFig. 2. Fig. 4 is 'a detail view in perspective of the file-carrier tripand tension devices.

Similar numerals of reference indicate corresponding parts in all thefigures of the drawings.

The frame of the filing-machine embodying our invention comprises sideplates 1, connected at intermediate points by cross-bars 2 and 3 (thelatter of which is provided with an intermediate -guide 4) and alsoby'crossbars 5 and 6, provided with guides for filecarriers 7 and 8.These file-carriers are connected by means of pitmen 9, with crankdisksl0, carried by a driver shaft 11, which is mounted transversely in aconnecting-arch 12, spanning the frame near its rear end, and saiddriven shaft receives motion by means of a pinion 13,with which meshes adriving-gear 14 (of larger diameter than said pinion) on thedriving-shaft 15. Any suitable means, such as a crank-arm 16, may beprovided for actuating `the driving-shaft.

The cross-bars 5 and 6 are provided with preferably open-ended guides 17for the filecarrier 7, and are also respectively provided with guides 18and 19 for the file-carrier 8, all of said guides being elongatedtransversely to allow of sufficient transverse movement of the free endsof the file-carriers to disengage the files 20, carried thereby, fromthe teeth of a saw. (Indicated in dotted lines in Fig. 2.)

Furthermore, while the vguides 17 and 18 are Xed and may be formedintegral with the bars 5 and 6, by which they are carried, the guide 19is adjustable in a plane perpendicular to the transverse movement ofthe-filecarriers or in a plane parallel with a saw which is being filed.To accomplish this adjustment, the guide 19, which consists of a slottedblock, is fitted for adjustment in a parallel-sided seat 21 in the frontcross-bar 6, and an adjusting device, such as a screw 22, is mounted onthe cross-bar to bear terminally against the under side of the block tovary the position of the guide, and hence of the file-carrier 8, tosecure the desired vertical interval, or interval measured in the planeof the saw-blade, between the files to suit the interval between thecontiguous teeth of the saw which is being led, (it being Well knownthat different gin-saws are provided with teeth spaced at differentintervals.) The guide-block is secured at the desired adjustment bymeans of a set-screw 22, mounted in the side wall of the seat andimpinging terminally against the block.

The saw-feeding mechanism,which we have illustrated in the drawings,consists of a slide or plunger 23, mounted contiguous to its rear end insaid guide 4c and at its front end in a similar guide eta, dependingfrom thefront cross-bar 6; feed-pawls24 and 2,5, carried by said plungeror slide to terminally engage 27 on the driving-.gear'for intermittentcon- IOO tact with the end of the plunger or slide to a fulcrum pin orspindle 3l, which, in the advance it, and thus cause the feed-pawls toengage the teeth of and actuate the saw. In the construction illustratedthe cam 27 is adj ustably mounted upon the driving-gear by means of aslotted ear 2S, engaged by a setscrew 29, whereby the cam may bepositioned to cause the desired throw of the feed-pawls to move the sawa distance corresponding with the interval between contiguous teeththereof. The object in using a plurality of feed-pawls, as is well knownin the art, is to insure the forward feeding of a saw at each operationof the slide or plunger, even should said saw have one or more broken ordisplaced teeth. Should one pawl fail to feed the saw, by reason of theabsence of a tooth, the other pawl will perform the required feedingfunction.

It is obvious that the file-carriers will perform a plurality ofcomplete reciprocatory movements foreach rotation of the master ordriving gear, and hence between two consecutive operations of thefeeding mechanism; but at the moment of feeding, the saw to bring otherteeth into operative position with relation to the file, it is necessaryto wholly withdraw the files from contact with the saw to prevent injuryto the teeth just dressed. To accomplish this object, we employ a tripmechanism actua-ted by the saw-feeding devices and having for itsessential elements a trip 30, consisting-of a yoke having parallel sidearms 3l, beveled at their inner surfaces to engage the exterior sideedges of the iilecarriers and also provided with a bifurcated arm orextension 32, which is pivotally connected to the front end of theplunger or slide of the feeding mechanism. It will be seen that theforward movement of the plunger or slide causes the backward movement ofthe trip-yoke and by reason of the relatively diagonal positions of thefile-carriers the inward lateral movement of the file-carriers to removethe files laterally from the saw-teeth. The initial forward movement ofthe plunger or slide, preparatory to the engagement of the feed-pawlswith the teeth of the saw, actuates the trip-yoke, which is positivelyconnected with said plunger or slide, and thus removes the iile fromcontact with the sawteeth before the feeding movement of the saw isinitiated.

As above described, the file-carrier guides are of such construction asto allow lateral movement of the carriers to vary the positions of theiiles transversely with relation to the saw, and this feature of theconstruction also enables us to employ tension devices, cooperating withthe file-carriers for varying the pressure of the les against thesaw-teeth, and thus vary the extent and rapidity of the iilingoperation. The preferred construction of tension device consists of abearing-plate 33, interposed between the inner edges of thefile-carriers and pivotally mounted at an intermediate point for rockingmovement upon construction illustrated, projects rearwardly from thefront cross-bar G. This bearingplate is fulcrumcd between the horizontalplanes of the Ille-carriers to bear terminally in opposite directionsagainst the inner edges of said carriers, and inasmuch as thebearing-plate is arranged in rear of the point of intersection of thefile-carriers it will be seen that outward pressure by the bearing-platewill cause the files to press inwardly upon opposite sides of the teethof a saw. The means which we have devised and prefer for holding thebearing-plate in contact with the filecarriers, and thereby holding thecarriers pressed outwardly, are of yielding construction and include atorsion-spring 35, attached at one end to the bearing-plate and at theother end to a tension-adjusting disk 36, and locking means for securingsaid disk with the torsion-spring at the desired adjustment. In theconstruction illustrated the torsion-spring for actuating thebearing-plate is of the coiled type and is arranged concentrically withthe spindle or pin upon which said bearing-plate is mounted, and it isobvious that the turning of the adjusting-disk serves to actuate thebearing-plate with greater or less Vforce to cause the desired outwardpressure upon the file-carriers. \Vhen the above construction isemployed, we preferably adopt a locking device (for holding theadjusting-disk in the desired position) consisting of a thumbnut 37,threaded upon said spindle or fulcrum-pin of the bearing-plate.

The coiled construction of torsion-spring is preferable for the purposedescribed, for the reason that it allows a slight yielding movement ofthe bearing-plate approximately parallel with the file-carriers, whenthe friction at the points of contact of said carriers with thebearing-plate is excessive, and by threading the adjusting-disk 36 uponthe fulcrum pin 'or spindle of the bearing-plate, the adjustment of thetorsional tension ofthe spring will also serve to adjust the axialtension thereof, while the locking device, when constructed as athumb-screw, will serve to securely hold the adjusting-disk againstaceidental movement, both revolubly and axially.

The peculiar means for mounting the slide or plunger operating cam uponthe drivinggear-namely, by means of a slot and an engagingset-screw-provides for varying the adjustment of said cam both radiallyand angularly or pivotally. It is obvious that the radial adjustment ofthe cam will vary the throw ofthe slide or plunger in extent, whereasthe pivotal adjustment of the cam is designed to vary the throw of theslide orplunger in abruptness or rapidity. It will be seen that byinclining the face of the cam to the direction of its movement or itspath the slide or plunger may be advanced either rapidly or gradually,as may be preferred.

Various changes in the form, proportion, and the minor details ofconstruction may be IOO IIO

resorted to without departing from the spirit or sacrificing any of .theadvantages of this invention.

Having described our invention, whatwe claim isl. In a saw-filingmachine, the combination with reciprocatory laterally-movablefile-carriers, and` operating devices, of a rocking plate, bearing inopposite directions against said carriers, and adjustable means foryieldingly holding said plate in operative engagement with the carriers,substantially as specified. f

2. In a saw-filing machine, the combinationwith reciprocatorylaterally-movable file-car-` riers, and operating devices, of afulcrumed bearing-plate having its arms in contact with said carriers toyieldingly press them in opposite directions, a torsion -spring, foractuating said plate, provided with an adjusting-disk, and means forsecuring the said adjusting-disk at the desired adjustment,substantially as speciied.

4E. In a saw-liling machine, the combination with reciprocatorylaterally-movable file-carriers, and operating devices, of a fulcrumed.bearing-plate terminally arranged Ato bear in opposite directionsagainst the file-carriers, a torsion-spring terminally connected to thebearing-plate, a revoluble adjusting-disk attached to the opposite endof the torsionspring, and a clamping or jam nut arranged in operativerelation with the adjusting-disk, substantially as specified.

5. In a saw-ilin g machine, the combination v with reciprocatorylaterally-movable file-carriers, and operating devices, of a fulcrumedbearing-plate arranged to bearat its extremities in opposite .directionsagainst the carriers, a coiled torsion-springconnected at one end tothe-bearing-plate, an adjusting-disk connected to theopposite end of thesaid spring and capable of revoluble and axial adjustment, and means forlocking said disk at the desired adjustment, substantially as specified.

6. In a saw-filing machine, the combination with reciprocatorylaterally-movable file-carriers, and operating devices, of a fulcrumed`bearing-plate arranged to bear terminally in opposite directions againstsaid carriers and capable of axial yielding movement approximatelyparallel with the paths of the carriers, an actuatin g-sprin g forholding said bearingplate torsionally and axially in its normalposition, and adjusting devices for said actuating-spring, substantiallyas specified.

`ing a spring-returned slide or plunger termivriers and operatingdevices, of saw-feeding mechanism including a slide or plunger mountedfor reciprocation in a plane approximately parallel with the{ile-carriers, a spring for returning the slide or plunger andyieldingly holding it in its normal position, operating devices forperiodically advancing the slide or plunger, and a trip-yoke pivotallymounted at an intermediate point for swinging movement, and havingparallel arms arranged in operative relation, respectively, withdiagonally-disposed surfaces of the filecarriers, and adapted, whenactuated, to move said carriers laterally in opposite directions, saidtrip-yoke having a slotted connection with the slide or plunger, wherebythe yoke is yieldingly held in its normal position by the return-springof the slide, substantially as speciiied. f

8. In a saw-filing machine, the combination with a supporting-frame, ofa driving-gear, 'Y tile-carriers operatively connected with thedriving-gear, saw-feeding mechanism, includ- 9o nally arrangedcontiguous to the driving-gear,

a cam mounted upon the driving-gear for radial and pivotal adjustment,and adapted for contact with the contiguous extremity of said slide orplunger, means for securing said cam at the desired adjustment to varythe extent and rapidity of throw of the slide or plunger,

and a trip-yoke operatively connected with said slide or plunger andhaving arms arranged in operative relation with inclined surroo faces onthe file carriers, substantially as specified.

9. In a saw-filing machine, the combination with a supporting-frame, ofa driving-gear, file-carriers operatively connected with the 1o 5 driving-gear, saw-feeding mechanism, including a spring-returned slide orplunger terminally arranged contiguous to the driving-gear,

a radially and pivotally adjustable cam carried by the driving-gear forcontact with the 11o contiguous extremity of said slide or plunger,

and having a radially-disposed slot,a set-screw engaging said slot tosecure the cam at the desired radial and pivotal adjustment, and atrip-yoke operatively connected with said r 15 slide or plunger andhaving arms arranged in operative relation with inclined surfaces on thefile-carriers, substantially as specified.

' In testimony that we claim the foregoing as our own we have heretoaffixed our signatures 1 zo in the presence of witnesses.

JAMES H. WALTERS. WILLIAM HENRY WALTERS.

